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(a) Write the structure of Cr2O7^(2-) ...

(a) Write the structure of `Cr_2O_7^(2-)` Give two uses of `K_2Cr_2O_7` .
(b) Write note on interstitial compounds.
(c) Compare the chemistry of actinoids with that of lanthanoids with special reference to: (i) Atomic sizes (ii) Chemical reactivity.

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MODERN PUBLICATION-D AND F-BLOCK ELEMENTS-REVISION EXERCISES ( SHORT ANSWER QUESTION)
  1. Complete the following chemical equations : (i) 8MnO(4)^(-)+3S(2)O(3...

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  2. Give reason for the following : (i) Mn shows the highest oxidation s...

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  3. (a) Write the structure of Cr2O7^(2-) Give two uses of K2Cr2O7 . ...

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  4. (a) Explain the magnetic behaviour of transition metals. (b) Write...

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  5. Explain :(i) Variable oxidation states of d-block elements (ii) d-bloc...

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  6. (a) Define transition elements. (b) Give general electronic configurat...

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  7. Give reason. (a) Cerium (Ce) exhibits +4 oxidation state.(b) Actinoid ...

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  8. Write any three applications of d and f-block elements.

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  9. (i) Which of the following are coloured in aqueous solution ? Give rea...

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  10. (i) Explain why most of the Cu(I) compounds are unstable in aqueous so...

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  11. (i) What is the most common oxidation state of the actinoids? (ii) Why...

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  12. Zn^(2+) salt are white while Cu^(2+) salts are blue. Assign reason.

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  13. Calculate the number of unpaired electrons in Cr^(3+) and V^(3+) io...

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  14. How will you account for the following: (a) Actinoids exhibit more num...

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  15. (i) What are interstitial compounds ? (ii) Transition metals show good...

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  16. (a) Define transition metals. (b) Why do transition metals form colour...

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  17. (a) What is lanthanoid contraction and write its consequences ? (b) Dr...

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  18. (a) Why are Zn, Cd and Hg not regarded as transition metals? (b) Why d...

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  19. (a) How will you prepare KMnO4 from pyrolusite ore ? (b) Complete the...

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  20. (a) Why do transition metals act as good catalysts? (b) Why do transit...

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